I agree that this is the shape of the answer, but I think that fat being preferential to muscle as a calorie store leaves not a lot of room to believe that musc

I agree that this is the shape of the answer, but I think that fat being preferential to muscle as a calorie store leaves not a lot of room to believe that muscle had substantial other advantages to health. Now of course, it might not be having the muscle that is healthful, but the activities involved in creating it.